body{
    background: #00003d;
    .banner{
        width: 100%;
        height: 500px;
        background: url(../img/top_pic.png) no-repeat center center;
    }
    .history{
        width: 100%;
        overflow: hidden;
        .historyMain{
            width: 1240px;
            margin: 0 auto;
            overflow: hidden;
            position: relative;
            
            .title{
                display: table;
                margin: 0 auto;
                height: 45px;
                
            }
        }
    }
}
